This level is fairly straightfoward, but can be tricky if you aren't particularly good at puzzles. Remember this though, hit the switch(es) in the order that produces a teleport or changes something. You start in a room with a switch and a teleporter. Hit the switch and enter the teleport. Go to ladder l2 and hit the two switches in the next area. Go back to where you teleported teleport (if you can't, hit the switches in the other order), and teleport to the next room. Hit the two switches (2,1). Enter the teleporter. Hit the two switches in this area (1,2). Teleport.
You are now in a long corridor. Look at the map, and go to the chest so you can get the Battleaxe +3 and Longsword +3. Continue on. Ignore holes 3 and 4, and climb down hold 1 or 2. After climbing down, hit the switch in the area and climb back up the holes. Go back to the beginning of this corrider and a ladder will have appeared. That ladder leads to a room with a ladder that takes you to level 10!
The enemies in this level are relatively easy. Only Ghaunadan inhabit this level, and they shouldn't pose any risk to a skilled party. There is no boss in this level.